Electrically-controlled elevator.



No. 851,829. PATENTBD APR. so, 1907. 0. & F. 0. NAUJOKS. ELEOTRIOALLYCONTROLLED ELEVATOR.

APPLIOATIQN FILED APR.16,1906.

3 SHEETS-SHEET 2.

I N VEN TORS No. 851,829. PATENTED APR. 30, 1907.

' c. 65 F. 0. NAUJOKS.

ELEOTRIGALLY CONTROLLED ELEVATOR.

ARPLIOATION FILED APR. 16.1906.

3 SHEETS-SHEBT 3.

WITNESSES: 977 r m4 fima/zf z y J7 ATTORNEY.

UNITED STATES PATENT OFFICE.

CARL- NAUJOKS AND FREDERICK O. NAUJOKS, OF SAN FRANCISCO, CALI- FORN IA,ASSIGNORS OF ONE-NINTH TO GEORGE GOEPPERT, ONE NINTH TO BALLO BRUETTING,AND ONE-NINTH TO VICTOR MOOKEL.

ELECTRICALLY CONTROLLED ELEVATOR.

To all whom it may concern:

Be it known that we, CARL 'NAUJOKS and FREDERICK CARL NAUJOKS, subjectsof the Emperor of Germany, residing at San Francis co, in the county ofSan Francisco and State of California, have invented certain new anduseful Improvements in Electrically-Controlled Elevators, of which thefollowing is a specification.

This invention relates to improvements in electrically controlledelevators, the object .of the invention being to provide an apparatus bywhich the elevator can be operated by the passengers themselves, eitheron the several floors or in the elevator itself, and without thenecessity of employing a special operator for that purpose.

Before describing in detail the construction of the apparatus, it may bedesirable to explain its general mode of operation. Supposing that theelevator is standing still at any floor of the building then thecorresponding door of the elevator will, under those circumstanoes, beopen. When a person'on a floor above or below desires to use theelevator, he presses an electric push button arranged on the frame workof the elevator, at the floor where he is standing. This withdraws alatch which holds the door open, and allows the door to close, by aweight or a spring, as may be preferred. When the door closes, it closesa circuit throughthe motor, energizing the motor. The direction of thecurrent permitted to pass through the motor is made to depend uponwhether a button above or below the elevator is pressed, so that in theformer case the elevator moves up, and in the latter case it moves down.

When it arrives at the floor at which the button was pressed, it breaksthe circuit which was closed through the motor, and also actuates alever which opens the door, this door being then held open by the latchheretofore mentioned. A device then stops the elevator on a level withthe floor. The passenger then steps into the elevator and presses abutton in the elevator corresponding with the floor to which he desiresto go, whether up or down. There will be a number of series of suchbuttons provided in the elevator,

as, for instance, one series on each of the three sides of the elevator,so as to be within easy reach of anypassenger. The pressureSpecification of Letters Patent. Application filed April 16, 1906.Serial No. 311,888.

Patented April 30, 1907.

on this button closes the circuit which withdraws the latch which heldthe door open, so that the door closes, and, in like manner as before,the closing of the door closing a circuit in the motor, the direction ofthe current through the motor being determined by the position of thefloor corresponding to the button pressed. The elevator then ascends ordescends to the desired floor and is arrested in the same manner asbefore, and the door is automatically opened.

Should a passenger on any floor press a button when the elevator ismovin toward him either from above or from beIo'w, this willautomatically arrest the elevator and will automatically open l thedoor. But should he press the button when the elevator is moving awayfrom him, this will have no effect upon its movement; Should there be anumber of passengers on the different floors all wishing to enter theelevator, who press buttons on the elevator frame, the elevator, ifmoving toward said passengers, will stop at each one in succession, andthe door will automatically open. In like manner, should there be anumber of passengers in the elevator wishing to leave the elevator ondilferent floors and who have pressed the corresponding buttons, theelevator will then stop in succession at the corresponding floors.

In the accompanying drawings, Figure 1 is a diagram of the apparatus;Fig. 2 is a broken rear view of the elevator, showing one of theelevator doors in inside elevation;

, Fig. 6 is a side view of the regulator; Fig. 7 is a section of thegrip; Fig. 8 is a broken perspective view of the inner ends of thecurrent divider strips; Fig. 9 is a sectional view of one of said ends;Fig. 10 is a side view of a break at a door; Fig. 11 is a verticalsection thereof; Fig. 12 is a diagrammatic view,

showing the modification of the apparatus as applied to a water-actuatedelevator.

The electrical partof the apparatus comprises the following circuits:-First, the motor circuit, which must be closed in order to start themotor to move the elevator. This circuit is-provided with means forchanging the direction of the current through the armature, so as tochange the direction in which the main through a push button carried bythe elevator and corresponding to the floor at which it is desired tostop. Third, a safety door circuit, which is a circuit passing inparallel through safety devices of the several doors of theelevator'shaft, and then passing through a check-controlled deviceclosed by the closure of the controller circuit of any floor, so as toinsure all 'doors closing before the elevator is started.

{ a- The controller circutt.Leading from a wire 1 (hereinafter known asthe third wire) connected with the positive main 2 of the positive andnegative mains 2, 3,-is a wire 4 which leads to all the ush buttons 5 ofthe several floors of the e evator shaft. From the other sideof eachpush button leads an individual wire. 6 through a magnet 7 and thence bya wire 8 to'one of two current dividing strips 9,10, extendingrespectively to the bottom and top of the elevator shaft, and therebeing wound by springs 11 upon drums 12. The other ends of said strips9, 10, which. are adjacent to each other are carried by the elevator.Theendof the wire 8 is maintained in contact with one or the other ofthe contact strips 9, 10, by being connected to an individual plate 13which is secured at tance that the contact any convenient point at thefloor corresponding to the push button, and has two spring metal lips14, which at the middle are almost in contact. with each other, but atthe upper and lower edges flare outward from each other, so that eitherstrip when passing between said lips is maintained in close contacttherewith by the pressure of the same. The ends of the strips which areadjacent to each other, are each made tapering orwith a fine edge 16 asshown in Fig. 8, said edges be.- ing separated fromeach other to such adisplate 13 can he between them without be1ng in contact with either, sothat in this position there is no short circuit between the circuitvdividing strips, and the contact plate 13 isnot connected with eitherstri This is the osition corresponding wit the point at w ich at eachfloor.

From the end of eac current divider strip is a Wire 17 leading to acontact'point 18 over which swings a direction chan er 19 upon an arm 20on a shaft 21 said s aft having a forked arm 22, the ends of which arepivoted to a friction grip 23 through which passes a stationary cable 24extending through the sc esa shaft and secured at top and bottom.- Onone side of said gri extends posts 25 the ends of which are threaded andcarry nuts 26'which press against a plate 27 by which plate iscompressed a spring 28 the other end of which presses against a block 29and forces said block against said cable 24, thus furnishing a uniformpressure of said grip upon said wire. When the elevator is moving, as,for instance, downward, the gri on account of its frictional contactwith t e cable, lags behind, causing the slotted forked arm to extendupward, and the direction changer to swing downward, and thus bringingit into contact with the contact point 18 connected with the lowercurrent divider strip. The direction changer is connected by a wire 30with the negative main 3. By this means all the electro-magnets oftheiioo'rs below the elevator are placed in parallel upon a circuit andleading through the push buttons 5, the current divider strip 9 and thedirection changer, while those of the floors above the elevator are on abroken circuit. Consequently to close one of these circuits below theelevator all that is necessary is to press the push button 5, whereuponthe electro magnet 7 is energized. However, any electro magnet 7 of aoor below the elevator may also be energized by a circuit having a pushbutton in the elevator itself. For this purpose there is provided a wire32 leading from the third wire 1 to a bar 33 adapted to contract withany one of a series of push buttons 34 each button 34 leading by a wire35 to the wire 6. The circuit then continues in the same way as beforethrough the electromagnet 7, contact 8, current divider strip '9 or 10direction changer 19, wire 30, to the negative main 3. Thus uponpressing any push-button 4 on a floor of the elevator shaft belowtheelevator, or on pushing any push button 34 in the elevator correspondingto a floor below the elevator, the corresponding electro-magnet 7 can beenergized. The

effect of energizing this magnet is to withdraw a latch 36, permitting aswitch carrier 37 to swing, under the action of a sprin 38. The movementof this switch carrler c oses two circuits, the motor circuit, and thedoor safety circuit.

The motor circuit-The motor circuit is as followsz-From the positivemain 2, by a wire 39, passing in series through breaks 40,

one for each door of the elevator shaft, to the 20 top of said shaft,then returning by a wire'41,

to a contact 42, arm 43 ofthe switch carrier 37, wire 44, to a contact45 of a circuit changer 46, wire 47, (the parts from 42 to 47 beingrepeated for each floor ofthe shaft) thence to a common wire 48 leadingto a contact 49 on one side of the armature, through the armature 50,then by a contact 5]. to a wire52, connected at each floor of theelevator with a wire 53 leading to a contact 54 of the circuit changer,thence by a wire to an arm 56 carried by the switch carrier, which, bythe removal of said latch as aforesaidhas been brought into contact witha contact 58, thence by a wire 59, to a common wire leading to oneendofthe field magnet coil 61, through said coil, and then from the otherend of said coil'to the negative main 3.

The position of the circuit changer, depends upon the location of theelevator relative to the'fioor at which the circuit is thus closed. Ifthe elevator is above said floor the current will be such that when thecircuit is closed it will actuate the motor to cause the elevator todescend. if the ele vator is below the floor at which. the circuit isclosed, then the current will be such that the motor will be moved inthe direction causing the elevator to ascend. This is ac complished bymeans of a projection 62 extending from the side of the elevator, which,

as the, elevator passes, is adapted to contact I with one or the otherof two arms 63. When the elevator passes these arms in descending, thisextension strikes the lower of the two arms and shifts the circuitchanger from the position shown in the lower portion of Fig. 1

to the position shown in the upper portion of said figure. It will bereadily seen that the electrical connections of the two wires 44', 55,with the two contacts 45 and 54 are now interchanged, so that thecurrentproceeds through the armature in the opposite direction to that formerlytaken;

The circuit changers are so situated that when the elevator stops at anyfloor, the projection 62 is midway between said arms 63.

At that time, obviously, all the circuit changers below the elevator arein theposition shown in the lower part of Fig. 1, and all the circuitchangers above the elevator are in the.

position shown .in the upper part of said'figure. Consequently if aperson in the elevator wishes to descend and energizes a magnet belowhim, or if a person on a floor below the elevator wishes to bring theelevator down, and presses the corresponding push button, thusenergizing the corresponding magnet, the circuit will be closed in sucha way as to operate the motor to bring the elevator down, and if aperson in the elevator wishes to as cend and energizes amagnet abovehim, or if a person on a floor above the elevator presses thecorresponding push button, the motor will be operated in the oppositedirection.

But it has been stated that the circuit cuit can not be closed, and .themotor started,

unless every door in the elevator shaft is closed.

Each break comprises a series, as four, of

contact strips 64:, each conne'cted at sufficiently long intervals witha high resistance wire 65, these strips being secured upon the frame 66of the shaft, adjacent to the door. Upon the door 67 itself is secured abracket 68 for acontactarm 69 pivoted at 70 and carrying a springcontact 71. To a point 72 said arm 69 below its pivot is connected thelower end of a stretched spring 7 3, the upper end of which is connectedto the top of a post 7 a on said bracket. The effect of said spring isevidently to quickly throw the contact arm to one or the other side ofthe center. Upon the frame, in the path of the bottom of 4 the arm 69,are provided stops 75, 7 6, and the operation of this part of the deviceis therefore as follows :Supposing that the door is being opened, bymechanism to be presently described,-the contact arm will then extendfrom its pivot downward away from the first of the series of contactstrips, the contact spring will then pass in succession over the contactstrips. Said contact strips and said resistance Wire are connected withthe wire'39 leading to the main 2, while the contact arm is connectedwith the wire 41 leading to the motor. As the contact spring moves oversaid strips in succession, it evidently throws more and more resistanceinto the circuit through the motor, causing the' current to diminish andchecking the speed of the motor, so that when the door is fully o enedthe current through the motor is so s ight that it is ready to stop.When the end of the arm 69 strikes the stop at that end of its path,said stop causes said arm to swing across and when the stretched springpasses the pivot, said spring acts to throw the arm quickly past thecenter, and thus remove the contact spring 71 from the last contactstrip and break the circuit.

It being understood that the circuit through the motor will not becloseduntil all the doors in the elevatorshaft are closed, it remains tobe seen how any open door, particularly' the one through which thepassenger has just entered, or the one at the floor where the lastpassenger has left the elevator, is automatically closed upon pressingthe push button. It will have been understood that the direction changerwhich is quickly actuated by two springs on opposite-sides is onl tiltedwhen the elevator is moved. When the elevator stops, said springs tendto move said direction changer into a horizontal position. A regulator77, the detailed construction of which will be presently described, isprovided to regulate the time taken to bring the direction changer tothis horizontal position. When it is in the hori zontal position it isin contact with both of the current divider strips,so that when theelevator is at rest, and has been at rest for a sufficient length oftime, all of the magnets of liO &

edges 78, 79, extending inwardly toward said path. Said edges, when theswitch carrier has been swung inward, are adapted to contact with aprojection extending rearwardly from the elevator and to be pressed.

back thereby as the elevator passes, thereby breaking the circuitthrough the motor, and stopping the motor. But before so doing, theswitch carrier presses against one or the other (according as theelevator is ascending or descending) of two contact strips 81 and thuscloses a circuit 82 passing in parallel through two pairs of contactpoints 83, said circuit being derived from the wires 1 and 3, andpassing through an electro-magnet 84 secured on the under side of theelevator. This magnet then attracts an armature 85 against the tensionof a spring86 thereby with-drawing a latch 87 and releasing a lever 88actuated by a spring 89, the other end of the lever carrying a fork 90,which fork is thereby moved toward thefront of the elevator shaft, sothat one or the other rollers 91 carried on its members is in positionto engage the arm 92 of a lever 93, pivoted at 94 and depresses the arm93 thereby elevating the other end of the lever, which is attached bycords 95 to arms 96 of hell crank levers 97 pivoted at 98, the otherends of the bell crank levers being attached by cords 99 to the edge ofthe door 67. Thus whether either roller strikes the arm 92, indescending or ascending, the effect will be the same, to slide the doorfrom the front of the elevator.

It is by this motion that the door carrying the contact arm makessuccessive contacts with the contact strips, and reduces the speed ofthe elevator before it is finally stopped by the outwardmovement of theswitch carrier which breaks the circuit. The end of the lever 88 carriesa roller 57 adapted to engage one or the other of two"'cam blocks 100,which return the lever to its original po sition, it then being caughtand held by the latch 87 of the armature which has been released fromthe electro-magnet 84. When the door is withdrawn in the manner thus described, a latch 101 operated by a spring 102 moves in front of thefront edge of the door and retains it open. This latch. can be withdrawnby means of an electro-magnet 103 senses close, which it will do byweights 104, or a spring might be provided for this purpose.

Safety door circuit.But provision is made that the circuit through theelectro-magnet will not be energized to withdraw the latch until thedoor has been left open a sufficient length of time to enable a personin the elevator to pass out therefrom. Which is as follows: When thedoor has been fully opened, a contact strip 105 carried at the loweredge thereof electrically connects two points 106, 107, in a circuitleading from the wire 1 by a common wire 108 then by a wire 109 throughthe electro magnets 103, then through the contact points 106, 107, to acommon wire 110. This common wire is connected by a flexible wire 111with a safety plate 112 carried upon the arm of the direction changer.When the elevator has just been arrested, the arm of the directionchanger is oblique to the horizontal, so that the safety plate iselectrically separated from a contact point 113. But when the elevatorhas been at rest a sufficient time the safety plate is moved so as tomake contact with the contact point 113, the circuit then proceedingfrom said point by a wire 114 to a thence by an individual wire '116-toa contact 117 which is adapted when the switch carrier swings inward toconnect with a contact 118 on said switch carrier which contact isconnected by an individual wire 119 with a common wire 120 leading tothe wire 3. Consequently, even should a push button be pressed to startthe motor, it will produce no effect until a sufficient length of timehas elapsed since the opening of the door, for the motor circuit passesin series through all the breaks at the doors, so that'if any door isopen the circuit is broken. But when the elevator has been at rest asufficient length of time, the circuit through the magnet 103controlling the latch 101 holding the door open is closed so far as thesafety plate 112 and contact point 113 are concerned. It will still beopen at all of the pairs of points 117, 118, on all of the switchcarriers, But as soon as any person, by pressing a push button, movessaid switch carrier, the door controlling circuit is closed, the'latchis withdrawn, and the door closes. The closing of all open doors, ifthere are more than one open, closes all the breaks at the doors andcloses the circuit through the motor.

The rcgulat0r.1n order to regulate the time elapsing from the stoppageof the door at any floor of. the elevator shaft until it can be startedagain either by the immediate pressure of a button or because a buttonhad already been pressed before the stoppage of the elevator, there isprovided on the shaft 21 of the arm 20 which-carries the currentdirection changer and the safety plate, a

and the door allowed to swing forward and l ratchet wheel 123, whichteeth are adapted wire 115 common to all ofthe shafts, and

ceases to be engaged by pawls 124 pivoted upon the arm, opposite sidesof the wheel, and con' trolled by cams 125 suitably supported upon theside of the elevator, said pawls being caused to normally engage saidratchet wheels by springs 126. Geared to said ratchet wheel is a pinion127 having a crank arm 128 pivotally connected to a rod 129 of a piston130 sliding in a cylinder 131 the other end of which is pivotallysupported, as shown at 132, the ends of said cylinder being connected,past the piston, by a narrow tube 133 the passage. through saidtubebeing regulated by a valve 134. By screwing said valve in or out thespeed at which oil or other suitable fluid can pass from one of thecylinders to the other through said passage can be varied, and thus thespeed at which the piston can move in the cylinder can be varied. Bythis means can also be varied the time taken by the arm 20 to return toa horizontal or central position under the ac tion of the springs. It isonly when it has returned to this central position that the elevator canagain be started. Stops 135 are provided on each side of said arm 20 tolimit the movement thereoi. Thus the operationof this part of theapparatus is as follows Supposing that the elevator is descending, thefriction grip 23 will move upward rela tively to the pivot of the arm,until arrested? by the upper stop 135. The pawl carriedthereby will nothowever engage the ratchet wheel, because its outer end will have 'en-igaged the cam 125, throwing the nose of the; pawl out of engagement with.the ratchet I wheel, so that the arm 20 can move freely upward. .Theother pawl can easily move over the teeth of the ratchet wheel. But assoon as the elevator comes to rest, and the friction grip no longer lagsbehind, the springs 141 tend to swing said arm into a horizontalposition, causing the pawl on the outer end of the arm to engage theratchet wheel, since theouter end of said pawl is not in engagement withits cam. Said arm can then only return slowly, since it is opposed bythe pressure in the cylinder upon the pis tion dueto the slow passageofthe oil past the valve.

jl'lotorcar'rent ChOlfT.-II1 this system the circuit through the motoris suddenly closed through the switch carrier, and this sudden closureof the circuit through the motor tends to burn out the coils of themotor, unless a rheostat or its equivalent is provided. To obviate thisobjection I provide the following contrivance. In one of the-wiresleading to the motor, as, for instance, the wire 3, is a break which isclosed by two circuits in parallel, of which one circuit 145 leadsthrough a rheostat 146 and another circuit 147 leads through a smallmotor 148. This latter circult is broken at two contact points 149 andfor connecting said points is an arm 150 of a.

switch 151. This switch has a fork 152 between the members of whichextends an arm 153 of a lever 154, the other arm of which is connectedby a cord 155 with an arm of a pawl 156 the nose of said pawl engaging aratchet wheel 157, said ratchet Wheel being connected to the shaft ofthe small motor. The arm 153 of the lever passes successively overcontacts of the rheostat, its movement being resisted by a coiled spring158. Upon the rheostat is a magnet 159 supplied by branch wires 160 fromthe two wires 145.

When there is no current through the wires leading to the main motor,this magnet is deenergized, and the lever 154 is drawn back by thespring 158 to the out of circuit point of the rheostat. This throws theswitch 151 into such position that it closes the circuit 167 through thesmall motor. 7 The result is that when the circuit is closed through themain motor except for this break a current passes through the smallmotor and starts it revolving, causing the ratchet wheel to revolve andto carry with it the pawl 156 and its arm 155 attached by the cord tothe lever 154 and causing the lever to pass successively over thecontact points of the rheostat, cutting out the successive resistancesof the rheostat so that a greater portion of the current can passthrough the main motor. When said arm has been revolved by the ratchetwheel into such position that all of the resistance of the rheostat hasbeen cut out, an extension 162 of a pawl strikes a stop 163 which throwsa pawl out of engagement with the ratchet wheels The spring 158 does nothowever retract the lever back to its original position on the rheostat,because the magnet '.159 is energized holding said lever in position togive a full current; At that time the arm of the lever has thrown theswitch so as to break thecircuit through the small motor.

Water Zif2.-ln Fig. 12 is shown a modification of the invention in whichwater power may be used to operate the elevator, the control of saidpower being effected by electricity For this purpose there is provided asupply pipe 170, a discharge pipe 171, and a lifting pipe 172, allcontrolled by a valve 173, adapted in one terminal position to admit thewater from the pipe to the pipe 172 and in. another terminal position toadmit the water from the pipe 172 to the pipe 171, and closing all thepipes when in its intermediate position. This valve is moved by means ofa pulley 1'74 driven from either of two motors 175, 176. The motor 175receives its current by the main wire 177, the current then passing by awire 178 to the several floors of the shaft and then returning by a Wire17 9 in precisely the same manner as by the wires 60 and 39, in theformer modification, said wire 179 being connected to a contact carrier180 having a contact 181-adapted to be in too @ senses connection with aplate 182 when the elevator is at rest, a wire 183 leading from saidplate to the main 184.. Therefore, when the elevator is at rest, and thecircuit between the wires, 178 and 179 is closed in precisely the samemanner as was the circuit between wires 60, 39 in the formermodification, the motor 17 5 is started causing the valve 173 to turn;and connecting the pipe 172 either with the 'ipe 170, or with the pipe171, this dependingu on the direction in which the motor is revo ved.This direction will be controlled by the circuit changer wires 185, 186which correspond precisely to the wires 52, 48, in the formermodification. Supposing, for the sake of illustration, that the valve isturned to admit the water to raise the elevator, and that the contactcarrier swings to the right into the position shown in the figure, then,after the valve has been sufficiently opened, the circuit through themotor 175 is broken, and the elevator continues on its upward motion, byreason of the admission of water into the pipe 172', until the valve isstarted on its return movement. This is accomplished by means of thesecond motor 176, which derives its current as follows :from the wire177 by a wire 188, contact 189, contact plate 190, wire 191, armature ofthe motor 176, wire 192, contact plate 193, contact 194, Wire 195, fieldmagnet of the motor, wire 196-, through one of av series of individualwires 197, individual contact 198, contact plate 199: on the side of theelevator, switch carrier 200, actuated precisely in the sanie manner asthe switch carrier in the first modification, individual wire 201,common wire 202., to the other main wire 184. Therefore when any pushbutton, either on the elevator or at a floor of the shaft, has beenpressed to cause the switch carrier to swing inward toward the path ofthe elevator, then when said elevator arrives at the positioncorresponding to said push button, the circuit is closed through thestopping motor, 176, and the valve is returned. to its central position,shut ting off the water from the uplift pipe. A precisely similaroperation takes place when the elevator is caused to descend by the flowof water from the uplift pipe into the discharge pipe, except that thecontacts 189,

194 are now connected with plates 2.03, 204, connected by wires 205.,206, with the wires leading to the armature in such a manner that thedirection of the current through the motor is reversed.

ll claim 1. in an elevator, in combination with means for raising andlowering the elevator, a controller circuit for controlling said means,comprising an electro-magnet, a circuit therethrough, circuit dividerstrips having adjacent ends connected to the elevator and extendingrespectively downward and up-' cent ends connected to the elevator andex tending respectively downward, and up ward therefrom, either of whichis adapted to form a part of the circuit, means whereby said strips areelectrically separated from each other when the elevator is in motionand are connected electrically only after the elevator has come to rest,and means carried with the elevator for closing said circuit,substantially as described.

In an elevator, in combination with means for raising and lowering theelevator, a controller circuit for controlling said means, comprising anelectro magnet, a circuit therethrough, circuit divider strips havingadjacent ends connected to the elevator and extending respectivelydown-ward and -up wardtherefrom, either of which is adapted to form apart of the circuit, means whereby said strips are electricallyseparated from each other when the elevator is in motion and areconnected electrically only after the elevator has come to rest, meansfor regulating the time after the elevator comes to rest when saidstrips are electrically connected, and means at each floor ,on theelevator shaft for closing said circuit, substantially as described.

l. in an elevator, in combination with means for raising and loweringthe elevator,

'a controller circuit for controlling said means,

comprising an electro-magnet, a circuit therethrough, circuit dividerstrips, having adja cent ends connected to the elevator and extendingrespectively downward and upward therefrom, means for winding up the endof either strip as the elevator moves toward said end, either of whichis adapted to form a part of the circuit means whereby said strips areelectrically separated from each other when the elevator is in motionand are connected electrically only after the elevator has come to restand means at each floor on the elevator shaft for closing said circuit,substantially as described.

5. in an elevator, in combination with means for raising and loweringthe elevator, a controller circuit for controlling said means,comprising an electro-magnet ,a circuit therethrough, circuit dividerstrips having adjacent ends connected to the elevator and eX- tending"respectively downward and upward therefrom, either of which is adaptedto form a part of the circuit, means whereby cent ends connected to theelevator and eX- tending respectively downward and upward therefrom,means for winding up the end of either strip as the elevator movestoward said end, either of which is adapted to form a part of thecircuit means whereby said strips are electrically separated from eachother when the elevator is in motion and are connected electrioally'onlyafter the elevator has come to rest, said means com prising acontrolling device permitted to move easily from its central positionoutward in any direction whilevariably restrained in its returnmovement, and means at each floor on the elevator shaft for closing thesaid circuit, substantially as descril: ed.

7. In an elevator, in combination with means for raising and loweringthe elevator, a controller circuit for controlling said means,comprising an. electro magnet, a circuit therethrough, circuit dividerstrips having adjacent ends connected to the elevator and,

extending respectively downward and u ward therefrom, means for windingup tile end of either strip as the elevator moves toward said end,either of which is ada ted to form a part of the circuit means wherebysaid stripsare electrically separated from each other when the elevatoris in motion and are connected electrically'only after the elevator hascome to rest, said means comprising a controlling device permitted tomove easily from its central position outward in any direction whilevariably restrained in its return movement, and means at each floor onthe elevator shaft for closing the said circuit, and consisting of acylinder, a piston moving therein and an operative connection betweensaid piston and the friction device brought into use only upon thereturn movement of v the latter, substantially as described 8. In anelevator, in combination with means for raising and lowering theelevator, a controller circuit for controlling said means, comprising anelectro magnet, a circuit therethrough, circuit divider strips havingadjacent ends connected to the elevator and cxtendingrespectivelydownward and upward therefrom, means for winding up the end of eitherstrip as the elevator moves toward said end, either of which is adaptedto form a part of the circuit means whereby said strips are electricallyseparated from each other when the elevator is n motion andare connectedelectrically only after the elevator has come to rest, said meanscomprising a controlling device permitted to move easily from itscentral osltion outward in any direction while varia ly restrained inits return movement, andmeans at each floor on the elevator shaft forclosing the said circuit, and consisting of a cylinder, a piston betweensaid piston and the friction device brought into use only upon thereturn moveclosing, a ratchet wheel, pawls either of which is adapted toengage and advance the ratchet wheel when moving in one of itsdirections but passing freely over the same in the other direction, camsfor disengaging said pawls when said operative connection is moving fromits central to its outer position, a gear wheel moving with the ratchetwheel and a pinion geared thereto, and an operative connection betweenthe iston and pinion, substantially as described 9] lin an elevator, incombination with a controller circuitfor controlling said means,comprising an electro magnet, a circuit therethrough, circuit'dividerstrips having adjacent ends connected to the elevator andextending respectively downward and upward therefrom, either of which isadapted to form a part of the circuit, means whereby said strips areelectrically separated from each other when the elevator is in motionand. are connected electrically only after the elevator has come torest, and means at each floor on the elevator shaft for closing saidcircuit, one side of said circuit having two branches, a ush button atthe floor of the elevator shaft corresponding with the magnet in one ofsaid branches, and a push button in the elevator inthe other branchsubstantially as described.

' 10. in an elevator, the combination. ofa circuit for controlling themovement of the elevator, said circuit passing in series through a breakat each floor of the shaft adapted to be closed by the correspondingdoor when closed/said circuit having branches, one for each floor of theshaft, each such branch having a break therein means actuated by theelevator moving ast any floor for changing thedirection of t 1e motivepower set in action by the closing of the motor circuit at that floor,and means at each floor for closing the corresponding latter break,substantially 1 as described.

means for raising and lowering the elevator,

moving therein and an operative connection o ment of the latteroperative connection in 8 senses 11. In an elevator, the combination ofa circuit through the motor, one side of said circuit having branches,onefor each floor of the elevator and each such branch having a breaktherein, said circuit then passing through a series of breaks, eachadapted to be closed by the closing of the corresponding door at thatfloor, andmeans for closing the first break at any floor, operable fromsaid floor, including a double. switch, and a branch through thearmature of the motor connected with said double switch, said doubleswitch adapted to be moved by the eleva tor when passing, substantiallyas described.

12. In an elevator, the combination of'a motor a circuit therethrough, aswitch carrier at each floor of the shaft, having -a switch, one side ofthe circuit through the motor being connected in parallel with all ofsaid switches, a wire connected in parallel with theother side of theswitch, said wire leading through a series of breaks one at each door ofthe elevator shaft and adapted to be closed by the closing of said door,a latch for holding said switch open, an electro-magnet for breakingsaid switch to permit it to close, and means for energizing said magnetat the corresponding floor of the elevator shaft, substantially asdescribed.

13. In an elevator, the combination of a motor, a circuit therethrough,a switch carrier at each floor of the shaft, having a switch, one sideof the circuit through the motor being connected in parallel with all ofsaid switches, a .wire connected in parallel with the other side of theswitch, said wire leading through a series of breaks one at each door ofthe elevator shaft and adapted to be closed by the closing of said door,a latch for hold- .ing said switch open, an electro-m'agnet for breakingsaid switch to permit it to close, and means for selectively energizingsaid magnet from the e'levator,'substantially as described. i

14. In an elevator, the combination of a motor, a circuit therethrough,a switch carrier at each floor of the shaft having a switch, one side ofthe circuit through the 'motor being connected in parallel with all ofsaid switches, a wire connected in parallel with the other side of theswitch, said wire leading through a series of breaks one at each door ofthe elevator shaft and adapted to be closed by the closing of said door,a latch for holdmg said switch open, an electro-magnet for breaking saidswitch to permit it to close, a

' push button at the corresponding fioor'of the shaft in one side of thecircuit through the magnet, a break in the other side and a deviceforclosing said break when the elevator is moving toward said floor, andfor opening said break when moving away therefrom, substantially asdescribed.

15. In an elevator, the combination of a motor a circuit therethrough, aswitch carrier at each floor of the shaft having a switch, one side ofthe circuit through the motor being connected in parallel with all ofsaid switches, a wire connected in parallel with the other side of theswitch, said wire leading through a series of breaks one at each door ofthe elevator shaft and adapted to be closed by the closing of said door,a latch for holding said switch open, an electro-magnet for breakingsaid switch to permit it to close, a latch for holding each door open,an electromagnet for withdrawing said latch, a circuit through saidelectro magnet, and means whereby said circuit is broken and thewithdrawal of the latch rendered impossible until after the elevator hasbeen at rest a predetermined period of time, substantially as described.

16. In an electric elevator, a motor check comprising, in combinationwith the main motor, arheostat, a small motor, one of the wires leadingto the main motor having a break closed by two circuits in parallel, ofwhich one circuit leads to the. rheostat and the other leads through thesmall motor, the latter circuit having a break therein, a switch forclosing said break, a lever having an arm passing successively overcontacts of the rheostat, said lever being operatively con nected withsaid switch, and a spring resisting said movement, substantially asdescribed.

17. In an electric elevator, a motor check comprising, in combinationwith the main motor, a rheostat, a small motor, one of the wires leadingto the main motor having a break closed by two circuits in parallel, ofwhich one circuit leads to the .rheostat and the other leads through thesmall motor, the

latter circuit having a break therein, a switch for closing said break,a lever having an arm passing successively over contacts of therheostat, said lever being operatively connected with said switch, and aspr ng resist- 'ing said. movement, and means for moving said lever fromthe revolution of the small motor, a magnet on a branch parallel withthe circuit through the rheostat, said magnet being adapted to hold saidlever when energized, substantially as described.

18. In an electric elevator, in combination with an elevator, a seriesof elevator doors, an electric circuit, and a motor in said circuit foroperating the elevator, a series of resistances arranged to besuccessively thrown into saidcircuit by the opening of an elevator doorto diminish the current therein and check the speed of the motor,substantially as described.

19. In an electric elevator, in combination with an elevator, a seriesof elevator doors, an electric circuit, and a motor in said circuit foroperating the elevator, a series of resistances arranged to besuccessively thrown into said circuit by the opening 'ofan elevator doorF our hands in the presence of two subscribing to diminish the currenttherein and check the sgeed of the motor, and means whereby, when t edoor is fully thrown open, said circuit is 5 opened at said break,substantially as described.

In witness whereof we have hereunto set witnesses.

- CARL NAUJOKS.

F. O. NAUJOKS.

Witnesses:

BESSIE GORFINKEL, F. M. WRIGHT.

